1.Ultra Slim Design dual sim card auto-switching function
2.2 numbers, 2systems, 2 providers in one mobile!
3.Display and edit your sim cards
4.Self-set auto-switching time
5.Compatible with all...
Voice volume adjustable
Industrial GSM module
Menu language: English and Chinese
Voice volume adjustable
Built-in charging system
Internal LI-NI backup battery
Supports English and...